ConvertSetup.exe (Freeware program – 780 kb) Convert is an easy to use unit conversion program that will convert the most popular units of distance, temperature, volume, time, speed, mass, power, density, pressure, energy and many others, including the ability to create custom conversions. You may also use WolframAlpha

SlavaSoft Hash Calculator — A fast and easy-to-use hash calculator you can use to check file integrity. (SlavaSoft HashCalc is freeware, please visit http://www.slavasoft.com/hashcalc/index.htm for more details.)